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Publishing Language: Chinese | Open Access

Angular resolution analysis of four-channel mainlobe interference cancellation for monopulse at subarray level

Hao WU1,2( ), Rang LIU1,2, Yu GUO1,2, Wantian WANG1,2, Jiahao ZHANG1,2, Jin MENG1,2
Institute of Military Electrical Science and Technology, Naval University of Engineering, Wuhan 430033, China
National Key Laboratory of Electromagnetic Energy, Naval University of Engineering, Wuhan 430033, China
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Abstract

The sum-difference four-channel mainlobe interference cancellation technique for monopulse radar at subarray level was studied. To this end, the signal model of four-channel interference cancellation at two-dimensional subarray level for monopulse radar was established, and a quantitative method using the signal-to-noise ratio loss of the useful signal as an indicator to characterize the angular resolution of mainlobe interference cancellation was proposed. Based on this, an analytical expression for the angular resolution of interference cancellation was further derived, and the theoretical boundary of the cancellation angle blind zone was clarified. The correctness of the analytical formula is verified by simulation and anechoic chamber experiment results. This research can provide a reference for the theoretical boundary analysis and engineering implementation of four-channel mainlobe interference cancellation technology.

Keywords

mainlobe interferenceinterference cancellationsum-difference four-channelmonopulse radar
CLC number: TN974 Document code: A Article ID: 1001-2486(2024)05-008-09

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Journal of National University of Defense Technology
Volume 46 Issue 5,
October 2024
Pages 8-16
DOI: 10.11887/j.cn.202405002

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WU H, LIU R, GUO Y, et al. Angular resolution analysis of four-channel mainlobe interference cancellation for monopulse at subarray level. Journal of National University of Defense Technology, 2024, 46(5): 8-16. https://doi.org/10.11887/j.cn.202405002

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Received: 02 September 2022
Published: 28 October 2024
© 2024 Journal of National University of Defense Technology

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).